Trolley.



m1, A7m,469. Patented oct. 7,1902.

J. F. KERR.

TROLLEY.

(Application med Aug. 5,1961

(No Model.)

WTNESSES:

JM d' 9157@ l lhviran "STATES PATENT OFFICE.

JOHN F. KERR, OF PATERSON, NEV JERSEY.

TROLLEY.

srncrrroarrorr fom-.ing me @freezers retenu No. 710,469, dated october 7, 1902. Application tiled yAugust 8, 1901. Serial No. 71,300. (No model) Tof/ZZ Ywhom, t may 00m/207%:

Be it known that l, JOHN F. HERR, a citizen of the United States, residing at 171 Hamilton avenue, city of Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Trolleys, of which the following is a specitication, reference beingrhad therein to the accompanying drawings.

My invention relates to trolleys for electricrailway cars, and has for one object to provide improved means for securing the trolleywheel against displacement from the line-wire while the caris running.

A lfurther object is to provide a device of this character which can be readily attached to the trolley-poles as now in ordinary use without the requirement of structural alteration.

A still further object is to enable the trolley-Wheel to swerve readily as required to either side of the line of draft when turning a curve and to permitv the wheel-support to be depressed and raised vertically when necessary and to control the swerving ofthe trolley-wheel, so that it will keep in its normal position or in alinement with the wire when not turning around a curve.

The accompanying drawings form a part of this specilication and represent what l consider the best means of carrying out the invention.

Figure 1 is a side elevation, partly sectional. Fig. 2 is a front view, and Fig. 3 is a side elevation, of my invention slightly modilied.

Similar letters of reference indicate like parts in all the figures where they appear.

A is a trolley-head which comprises the body portion A', the shank A2 for securing to the pole the lu g A3, and a plug or plate-cap A,

B is a swivel-head adapted to turn in the body portion A' and provided with a fork or clevis B', into which the trolley-wheel C turns on the pivot or bolt C'. The groove or trough in the trolley-wheel C is peculiarly formed, as is shown in Fig. 2, the bed or bottom of the trough being curved where it receives and contacts with the line-wire. The curved bottom ot the trough is broken on both sides by an abrupt llat annular bearing-surface rising vertically at right angles to the axis of the wheel, which vertically extending annular face is adapted to guide and control the wheel as it presents a resisting-surface to the wire which turns the swivel-head in rounding a curve.

The spindle B'1 ot' the swivel-head B passes downwardly through the center of the body portion A' and through the plate-cap A4 and is secured therein by means of the washer BG and the securing-nut B5. A tube E', having on its upper end a plate E adapted for ballbearings, lits loosely around the spindle B4 in the body portion yA' and together with the lower portion B3 of the swivel-head B forms an annular ball-race for the spherical ballsf.

On the swivel-head B is formed a clevis B2, normally at right angles to the body portion A', in which the free end of the spring D is held. The lower end ot' the spring D is secured by a rivet D' in the lug A3 on the body portion A'. The spring D is thus securely held in a vertical position, the lower end thereof being secured to the body portion A' and the upper or free end thereof being held in the clevis B2 of the swivel-head B.

Around the tube E', which surrounds the spindle B", is located the helical spring F, the upper portion ot the spring bearing against the under side of the plate E and the lower end of the spring resting and bearing on the plug or plate-cap A4. This spring permits the slight required elevation and depression of the swivel-head B in the body portion A'.

The ball-bearings render the operation of the swivel-head B easy, and the spring D permits and controls the swerving of swivel-head B when the Wheel is rounding a curve and then causes the swivel-head and the trolleywheel, which is carried in the rearwardly and upwardly extending support and clevis B', to return to its normal position in alineinent with the line-wire. The spring F tends to keep the trolley C in contact with the Wire.

In Fig. 3 my invention is shown slightly modified. In Fig. 3 the swivel-head B turns on the stationary non-rotatable spindle K, which is secured therein by means of a nut K', and a clevis B31 is formed on the rearwardly and upwardly extending clevis portion, the spring D being secured to a lug A5,

forming a part of the body portion A', and the. upper or free end of the spring being held in said clevis B31.

IOO

The fork is always upright when the trolley-pole is at its usual angle for Working.

Parts of the invention can be used without the whole.

Modifications may be made without departing from the principles or sacrificing the advantages of the invention.

I claim- 1. A trolley-head, having a vertical tubular body portion and a lug integral therewith and a shank also integral therewith for securing to the pole, in combination with a swivel-head adapted to turn in said tubular body portion of the trolley-head, and having a rearwardly and upwardlyextendingfork and aforwardlyextending clevis both integral therewith, a trolley-wheel mounted to rotate in said fork at a point back of the center of said swivelhead, and a spring, the lower end of which is secured to said lug on the trolley-head, and the upper or free end thereof extending through the clevis on the swivel-head, substantially as set forth.

2. In a trolley, a trolley-head having a vertical tubular body portion, in combination with a swivel-head having a rearwardly and upwardly extending fork integral therewith, a Wheel mounted to turn in said fork at a point back of the turning-point of the swivelhead, a vertical spindle for said swivel-head extending through the tubular portion of the trolley-head, a tube surrounding said spindle and having an annular plate secured to its upper end, the upper surface of said plate and the bottom of said swivel-head forming an annular ball-race around said spindle, spherical balls located therein, a plug suitably secured in the lower end of said tubular portion of the trolley-head, and a helical spring surrounding said tube inside of the trolley-head, the upper end of the spring bearing against the under side of the plate on said tube, and the lower end of the spring resting and bearing on said plug, substantially as set forth. v

3. In a trolley, a trolley-head having a vertical tubular body portion, in combination with a swivel-head having a rearwardly and upwardly extending fork integral therewith, a wheel mounted to turn in said fork at a point back of the turning-point of the swivelhead, a vertical spindle for said swivel-head extending through the tubular portion of the trolley-head, a tube surrounding said spindle and having an annular plate secured to its upper end, the upper surface of said plate and the bottom of said swivel-head forming an annular ball-race around said spindle, spherical balls located therein, a plug suitably secured in the lower end of said tubular portion of the trolley-head, a helical spring surrounding said tube inside of the trolleyhead, the upper end .of the spring bearing against the under side of the plate on said tube, and the lower end ot' the spring resting and bearing on said plug, and means to permit and control the turning ot' said swivelhead, substantially as set forth.

4. The combination with the swivel-head, having a trailingwheel mounted thereon, and a vertical spindle, of the trolley-head, a tube therein through which said spindle passes, an expansion-spring surrounding said tube, and means for controlling the movement of said swivel-head in a horizontal plane, substantially as set forth.

In testimony whereof I affix my signature in presence ot' two Witnesses.

JOHN F. KEER.

Witnesses:

STELLA A. HUGHES, PAULINE MCLAUGHLIN. 

